Continuous longitudinal sealing mechanism

Abstract

The utility model discloses a continuous longitudinal sealing mechanism, and relates to the technical field of packaging machinery. The longitudinal sealing device comprises a longitudinal sealing ironing block mechanism and an unpowered pressing mechanism arranged below the longitudinal sealing ironing block mechanism, the longitudinal sealing ironing block mechanism is configured to heat a rolled film, and the unpowered pressing mechanism is configured to longitudinally press the heated rolled film to complete longitudinal sealing. The unpowered press-fit mechanism is of a passive structure, when the rolled film is alternately pulled by the upper transverse sealing mechanism and the lower transverse sealing mechanism to form continuous conveying, the rolled film penetrating through the unpowered press-fit mechanism drives the press-fit roller assembly of the unpowered press-fit mechanism to rotate, and longitudinal sealing of the heated rolled film is achieved. The longitudinal height of the multi-column strip-shaped bag filling structure cannot be additionally increased, the unpowered pressing mechanism does not have power, traction cannot be formed on a rolled film, and the heated rolled film cannot be subjected to tensile deformation.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machinery, and more specifically to a continuous longitudinal sealing mechanism. Background Art

[0002] At present, most of the longitudinal sealing mechanisms used in multi-column strip packaging equipment are intermittent longitudinal sealing mechanisms with intermittent sealing of left and right hot blocks, which cannot achieve continuous longitudinal sealing and cannot meet the longitudinal sealing requirements of multi-column strip packaging equipment with continuous filling and sealing.

[0003] For example, the invention patent application with publication number CN117068493A, publication date November 17, 2023, and titled "Multi-row strip bag packaging filling structure and filling method", uses an upper transverse sealing mechanism and a lower transverse sealing mechanism to alternately pull the film to achieve continuous conveying of the strip bags. In order to adapt to the continuous conveying of the strip bags of the filling structure, its longitudinal sealing mechanism should also be continuous. The invention patent application does not disclose what specific structure of the longitudinal sealing mechanism is used for adaptation.

[0004] Another example is the invention patent application with publication number CN113184291A, publication date July 30, 2021, and titled "A longitudinal sealing traction and heat sealing device". The longitudinal sealing traction and heat sealing device disclosed in the invention patent application includes a longitudinal sealing ironing block mechanism and an upper traction component and a lower traction component respectively located at the upper and lower positions of the longitudinal sealing ironing block. The longitudinal sealing ironing block mechanism is configured to heat the roll film, the upper traction component is configured to pull the roll film before heating, and the lower traction component is configured to pull the roll film after heating. The longitudinal sealing traction and heat sealing device can achieve continuous longitudinal sealing of strip bags.

[0005] Since the lower traction component of the longitudinal sealing traction and heat sealing device in the above-mentioned prior art is a traction component with power, it is relatively large in size and will occupy the longitudinal space of the multi-row strip packaging equipment, resulting in an increase in the longitudinal height of the multi-row strip packaging equipment. When it is applied to the CN117068493A-multi-row strip bag packaging filling structure, its longitudinal height will be further increased. The lower traction component of the longitudinal sealing traction and heat sealing device is a traction component with power. Even if an upper traction component is provided to provide partial traction, the heated roll film will still be stretched and deformed to a certain extent when it is pulled by the lower traction component, which will affect the overall shape and longitudinal sealing shape of the strip bag and fail to meet the packaging requirements of the multi-row strip bag. Utility Model Content

[0006] In order to overcome the defects and shortcomings in the above-mentioned prior art, the utility model provides a continuous longitudinal sealing mechanism. The continuous longitudinal sealing mechanism of the utility model is used in conjunction with an upper transverse sealing mechanism and a lower transverse sealing mechanism to solve the problem that the longitudinal height of the multi-row strip bag packaging filling structure is high, and the heated roll film is pulled by the lower traction mechanism, causing the heated roll film to be stretched and deformed. The continuous longitudinal sealing mechanism of the utility model includes a longitudinal sealing ironing block mechanism and an unpowered pressing mechanism arranged below the longitudinal sealing ironing block mechanism. The longitudinal sealing ironing block mechanism is configured to heat the roll film, and the unpowered pressing mechanism is configured to longitudinally press the heated roll film to complete the longitudinal sealing. The unpowered pressing mechanism of the utility model is a passive structure. When the roll film is alternately pulled by the upper transverse sealing mechanism and the lower transverse sealing mechanism to form a continuous conveying, the roll film passed by the unpowered pressing mechanism drives the pressing roller assembly of the unpowered pressing mechanism to rotate, thereby realizing the longitudinal sealing of the heated roll film. The utility model does not increase the longitudinal height of the multi-row strip bag filling structure, the unpowered pressing mechanism has no power, does not form traction on the roll film, and the roll film after heating will not be stretched and deformed.

[0007] In order to solve the above problems existing in the prior art, the utility model is implemented through the following technical solutions.

[0008] The utility model provides a continuous longitudinal sealing mechanism, including a longitudinal sealing ironing block mechanism, which is configured to heat a roll film; and also includes a non-powered pressing mechanism arranged below the longitudinal sealing ironing block mechanism, the non-powered pressing mechanism includes a mounting plate, on which are mounted a plurality of pairs of rotatable pressing roller pairs, the pressing roller pairs corresponding to the longitudinal sealing ironing block pairs in the longitudinal sealing ironing block mechanism, the roll film heated by the longitudinal sealing ironing block pairs continues to be transported downward, passes between the pressing roller pairs, and drives the two pressing rollers of the pressing roller pair to rotate, so as to longitudinally seal the roll film.

[0009] Further preferably, the unpowered pressing mechanism also includes an adjusting plate, which can move laterally relative to the mounting plate, and the pressing roller I in the pressing roller pair can be rotatably mounted on the mounting plate, and the pressing roller II in the pressing roller pair can be rotatably mounted on the adjusting plate; the mounting plate is provided with a waist-shaped hole for the pressing roller II to pass through and move laterally.

[0010] Further preferably, the pressing roller II is installed on the adjusting plate through the mounting shaft, and the mounting shaft is rotatably mounted on the adjusting plate; the pressing roller II is eccentrically mounted on one end of the mounting shaft, and the other end of the mounting shaft is equipped with an adjusting block; by rotating the adjusting block, the pressing force between the pressing roller I and the pressing roller II can be adjusted.

[0011] Further preferably, an adjustment seat extending downwardly toward the adjustment block is provided at the position of the adjustment block at the bottom of the adjustment plate, and a pair of adjustment screws are threadedly connected to the adjustment seat, and the pair of adjustment screws are respectively arranged on both sides of the bottom of the adjustment block; the deflection of the adjustment block is set by turning the pair of adjustment screws.

[0012] Further preferably, the longitudinal sealing ironing block pair comprises a left ironing block and a right ironing block, and when the left ironing block and the right ironing block are close to each other and closed, there is a gap between the left ironing block and the right ironing block for the roll film to pass through.

[0013] More preferably, the longitudinal sealing ironing block mechanism comprises a left driving assembly and a right driving assembly, the left driving assembly is configured to control the opening of the left ironing blocks of all longitudinal sealing ironing block pairs, and the right driving assembly is configured to control the opening of the right ironing blocks of all longitudinal sealing ironing block pairs.

[0014] More preferably, the left drive assembly and the right drive assembly are respectively a left drive cylinder and a right drive cylinder.

[0015] Compared with the prior art, the beneficial effects brought by the utility model are as follows:

[0016] 1. The continuous longitudinal sealing mechanism of the utility model first uses a longitudinal sealing ironing block mechanism to heat the roll film, and then longitudinally seals the heated roll film through a non-powered pressing mechanism. Since the non-powered pressing mechanism is used, the pressing roller of the pressing mechanism does not have traction. Therefore, when the heated roll film passes between the pressing roller pair, it will not be stretched and deformed by the pressing roller pair. The traction force of the roll film conveying can be realized by alternately pulling the film of the existing upper transverse sealing mechanism and the lower transverse sealing mechanism to achieve continuous conveying. This avoids the situation in the prior art where the heated roll film is stretched and deformed by the lower traction mechanism.

[0017] 2. The unpowered pressing mechanism in the continuous longitudinal sealing machine of the utility model does not require power drive, but only a pair of rotatable pressing rollers. Therefore, it omits the power transmission structure, and its occupied space can be greatly reduced. Compared with the structure of the lower traction mechanism adopted in the prior art, its longitudinal height can be reduced, thereby reducing the overall height of the multi-row strip bag filling equipment.

[0018] 3. The pressing roller pair in the non-powered pressing mechanism of the utility model is a passively rotating sealing film roll. When the film roll passes between the pressing roller pair and continues to be transported downward, the film roll drives the two pressing rollers of the pressing roller pair to rotate, thereby achieving the sealing of the heated film roll.

[0019] 4. In the utility model, the unpowered pressing mechanism also includes an adjusting plate, one pressing roller is assembled on the adjusting plate, and the other pressing roller is assembled on the mounting plate. When penetrating the film, the adjusting plate moves laterally relative to the mounting plate, that is, the distance between the pressing roller pair is widened to facilitate penetrating the film; the waist-shaped hole on the mounting plate provides an avoidance space for the pressing roller II installed on the adjusting plate.

[0020] 5. In the utility model, the pressing roller II is eccentrically mounted on the mounting shaft. When the mounting shaft is rotated by rotating the adjusting block, the pressing roller II deflects in an arc trajectory due to the eccentric mounting position of the pressing roller II. The pressing force between the pressing roller II and the pressing roller I can be adjusted through the deflection of the arc trajectory. The angle between the line connecting the axis of the pressing roller II to the axis of the pressing roller I and the horizontal line can also be adjusted to adjust the longitudinal sealing angle of the strip bags.

[0021] 6. In the utility model, in order to ensure the adjustment stability of the adjustment block, an adjustment seat is arranged at the bottom of the adjustment plate, and a pair of adjustment screws are arranged on the adjustment seat. The upper ends of the pair of adjustment screws are respectively abutted against the two sides of the bottom of the adjustment block. By turning the adjustment screws, the length of the adjustment screws extending out of the adjustment seat is changed, thereby achieving the control of the deflection angle of the adjustment block. The adjustment is simple and the structure is stable.

[0022] 7. When the longitudinal sealing ironing block pair in the longitudinal sealing ironing block mechanism of the utility model is closed, there is still a gap, and the roll film can pass through the gap. When the roll film passes through the gap, the left ironing block and the right ironing block of the longitudinal sealing ironing block pair heat the roll film. Compared with the structure of the existing longitudinal sealing ironing block mechanism, the longitudinal sealing ironing block pair of the longitudinal sealing ironing block mechanism of the utility model will not clamp and seal the roll film. The heated roll film is pressed by the pressing roller pair to achieve sealing, and then the continuous conveying and continuous longitudinal sealing of the roll film are achieved. The utility model is equipped with a left drive component and a right drive component, which is convenient for opening the longitudinal sealing ironing block pair and convenient for film passing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the continuous longitudinal sealing mechanism of the utility model;

[0024] Figure 2 This is a schematic diagram of the main structure of the continuous longitudinal sealing mechanism of the utility model;

[0025] Figure 3 It is a rear structural schematic diagram of the continuous longitudinal sealing mechanism of the utility model;

[0026] Figure 4 It is a top view structural schematic diagram of the continuous longitudinal sealing mechanism of the utility model;

[0027] Figure 5 It is a perspective structural diagram of the pressing roller pair of the utility model;

[0028] Figure 6 It is a three-dimensional schematic diagram of the assembly of the continuous longitudinal sealing mechanism and the film roll bag forming device of the utility model;

[0029] Figure 7 It is a front view schematic diagram of the assembly of the continuous longitudinal sealing mechanism and the roll film bag forming device of the utility model;

[0030] Figure numerals: 1. longitudinal sealing ironing block mechanism, 2. non-powered pressing mechanism, 3. mounting plate, 4. pressing roller pair, 5. longitudinal sealing ironing block pair, 6. adjusting plate, 7. pressing roller I, 8. pressing roller II, 9. waist-shaped hole, 10. mounting shaft, 11. adjusting block, 12. adjusting seat, 13. adjusting screw, 14. left ironing block, 15. right ironing block, 16. left drive assembly, 17. right drive assembly, 18. film rolling bag forming device. DETAILED DESCRIPTION

[0031] The following are exemplary embodiments of the present invention that are combined with the accompanying drawings to help fully understand the claims and their equivalents, wherein the specific details are only considered as exemplary and do not limit the scope of the present invention. Therefore, those of ordinary skill in the art can make various changes and modifications to the embodiments without departing from the scope and spirit of the present invention.

[0032] As a preferred embodiment of the present invention, refer to the attached specification Figure 1 , Attachment Figure 2 and attached Figure 4 As shown, this embodiment discloses a continuous longitudinal sealing mechanism, including a longitudinal sealing ironing block mechanism 1, which is configured to heat the roll film; and also includes a non-powered pressing mechanism 2 arranged below the longitudinal sealing ironing block mechanism 1, and the non-powered pressing mechanism 2 includes a mounting plate 3, on which are mounted a plurality of pairs of rotatable pressing roller pairs 4, the pressing roller pairs 4 corresponding to the longitudinal sealing ironing block pairs 5 in the longitudinal sealing ironing block mechanism 1, the roll film heated by the longitudinal sealing ironing block pairs 5 continues to be conveyed downward, passes between the pressing roller pairs 4, and drives the two pressing rollers of the pressing roller pair 4 to rotate, so as to longitudinally seal the roll film.

[0033] In this embodiment, the longitudinal sealing ironing block mechanism 1 is first used to heat the roll film, and then the heated roll film is longitudinally sealed by the non-powered pressing mechanism 2. Since the non-powered pressing mechanism 2 is used, the pressing roller of the pressing mechanism does not have traction force. Therefore, when the heated roll film passes between the pressing roller pair 4, it will not be stretched and deformed by the pressing roller pair 4. The traction force for the roll film conveying can be achieved by alternately pulling the film of the existing upper transverse sealing mechanism and the lower transverse sealing mechanism to achieve continuous conveying. This avoids the situation in which the heated roll film is stretched and deformed by the lower traction mechanism in the prior art.

[0034] In this embodiment, the unpowered pressing mechanism 2 does not require power drive, but only rotatably presses the roller pair 4. Therefore, it omits the power transmission structure, and its occupied space is greatly reduced. Compared with the structure of the prior art using the lower traction mechanism, its longitudinal height can be reduced, thereby reducing the overall height of the multi-row strip bag filling equipment. The pressing roller pair 4 is a passive rotation sealing roll film. When the roll film passes between the pressing roller pair 4 and continues to be transported downward, the roll film drives the two pressing rollers of the pressing roller pair 4 to rotate, thereby sealing the heated roll film.

[0035] As an implementation method of this embodiment, refer to the attached Figure 1 and attached Figure 5 As shown, the non-powered pressing mechanism 2 further includes an adjustment plate 6, which can be laterally moved relative to the mounting plate 3, the pressing roller I7 in the pressing roller pair 4 can be rotatably mounted on the mounting plate 3, and the pressing roller II8 in the pressing roller pair 4 can be rotatably mounted on the adjustment plate 6; the mounting plate 3 is provided with a waist-shaped hole 9 for the pressing roller II8 to pass through and move laterally. The adjustment plate 6 moves laterally relative to the mounting plate 3, that is, the distance between the pressing roller pair 4 is widened, which is convenient for film penetration; the waist-shaped hole 9 on the mounting plate 3 provides an escape space for the pressing roller II8 mounted on the adjustment plate 6.

[0036] As an example of this embodiment, the pressing force between the pressing roller pair 4 is adjusted by changing the relative position of the adjustment plate 6 and the mounting plate 3 .

[0037] As another example of this embodiment, the pressing roller II8 is installed on the adjustment plate 6 through the installation shaft 10, and the installation shaft 10 is rotatably mounted on the adjustment plate 6; the pressing roller II8 is eccentrically mounted at one end of the installation shaft 10, and the other end of the installation shaft 10 is equipped with an adjustment block 11; by rotating the adjustment block 11, the pressing force between the pressing roller I7 and the pressing roller II8 is adjusted. When the installation shaft 10 is rotated by rotating the adjustment block 11, due to the eccentric installation position of the pressing roller II8, the pressing roller II8 deflects in an arc track. The pressing force between the pressing roller II8 and the pressing roller I7 can be adjusted through the deflection of the arc track, and the angle between the connecting line between the axis of the pressing roller II8 and the axis of the pressing roller I7 and the horizontal line can also be adjusted to adjust the longitudinal sealing angle of the strip-shaped bag.

[0038] In order to ensure the stability of the adjustment block 11, refer to the attached manual. Figure 3 and attached Figure 5As shown, an adjustment seat 12 extending downward from the adjustment block 11 is provided at the bottom of the adjustment plate 6 at a position corresponding to the adjustment block 11, and a pair of adjustment screws 13 are threadedly connected to the adjustment seat 12, and the pair of adjustment screws 13 are respectively arranged on both sides of the bottom of the adjustment block 11; the deflection setting of the adjustment block 11 is performed by screwing the pair of adjustment screws 13. By screwing the adjustment screws 13, the length of the adjustment screws 13 extending out of the adjustment seat 12 is changed, so as to control the deflection angle of the adjustment block 11, and the adjustment is simple and the structure is stable.

[0039] As an implementation method of this embodiment, refer to the attached Figure 1 and attached Figure 4 As shown, the longitudinal sealing ironing block pair 5 includes a left ironing block 14 and a right ironing block 15. When the left ironing block 14 and the right ironing block 15 are close to each other, there is a gap between the left ironing block 14 and the right ironing block 15 for the film roll to pass through. The longitudinal sealing ironing block mechanism 1 includes a left driving component 16 and a right driving component 17. The left driving component 16 is configured to control the left ironing block 14 of all longitudinal sealing ironing block pairs 5 to open, and the right driving component 17 is configured to control the right ironing block 15 of all longitudinal sealing ironing block pairs 5 to open.

[0040] In this embodiment, when the longitudinal sealing ironing block pair 5 in the longitudinal sealing ironing block mechanism 1 is closed, there is still a gap. This gap can be adjusted between 0.05mm-0.3mm according to the thickness of the roll film. The roll film can pass through the gap. When the roll film passes through the gap, the left ironing block 14 and the right ironing block 15 of the longitudinal sealing ironing block pair 5 heat the roll film. Compared with the structure of the existing longitudinal sealing ironing block mechanism 1, the longitudinal sealing ironing block pair 5 of the longitudinal sealing ironing block mechanism 1 of the utility model will not clamp and seal the roll film. The heated roll film is pressed by the pressing roller pair 4 to achieve sealing, and then the continuous conveying and continuous longitudinal sealing of the roll film are achieved. The utility model is equipped with a left drive component 16 and a right drive component 17, which is convenient for opening the longitudinal sealing ironing block pair 5 and convenient for film threading. When the equipment is stopped, the left drive component 16 and the right drive component 17 open the longitudinal sealing ironing block pair 5 to avoid long-term baking of the roll film.

[0041] As an example, the left driving assembly 16 and the right driving assembly 17 are respectively a left driving cylinder and a right driving cylinder.

[0042] As another implementation method of this embodiment, refer to the attached Figure 6 and attached Figure 7As shown, the continuous longitudinal sealing mechanism of this embodiment is installed on one side below the roll film bag forming device 18 to seal the longitudinal opening of the strip bag formed by the roll film bag forming device 18; the roll film with the longitudinal opening of the strip bag passes between the longitudinal sealing ironing blocks 5, is heated by the longitudinal sealing ironing blocks 5, and then passes between the pressing rollers 4, and is pressed together by the pressing rollers 4 to achieve sealing. The continuous downward conveyance of the roll film can be achieved by alternately pulling the film of the upper transverse sealing mechanism and the lower transverse sealing mechanism, or by setting a lower traction mechanism below the transverse sealing mechanism.

[0043] While the inventive concept has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made thereto without departing from the spirit and scope of the invention as defined in the claims.

Claims

1. A continuous longitudinal sealing mechanism, comprising a longitudinal sealing ironing block mechanism (1), wherein the longitudinal sealing ironing block mechanism (1) is configured to heat a roll film; characterized in that: The invention also comprises a non-powered pressing mechanism (2) arranged below the longitudinal sealing ironing block mechanism (1), wherein the non-powered pressing mechanism (2) comprises a mounting plate (3), on which a plurality of pairs of rotatable pressing roller pairs (4) are mounted, the pressing roller pairs (4) corresponding to the longitudinal sealing ironing block pairs (5) in the longitudinal sealing ironing block mechanism (1), and the rolled film heated by the longitudinal sealing ironing block pairs (5) continues to be transported downward, passes between the pressing roller pairs (4), and drives the two pressing rollers of the pressing roller pairs (4) to rotate, thereby sealing the rolled film longitudinally.

2. A continuous longitudinal sealing mechanism as claimed in claim 1, characterized in that: The non-powered pressing mechanism (2) further comprises an adjusting plate (6), wherein the adjusting plate (6) can be laterally displaced relative to the mounting plate (3); a pressing roller I (7) in the pressing roller pair (4) can be rotatably mounted on the mounting plate (3); and a pressing roller II (8) in the pressing roller pair (4) can be rotatably mounted on the adjusting plate (6); and a waist-shaped hole (9) is provided on the mounting plate (3) for the pressing roller II (8) to pass through and move laterally.

3. A continuous longitudinal sealing mechanism as claimed in claim 2, characterized in that: The pressing roller II (8) is mounted on the adjustment plate (6) via a mounting shaft (10), and the mounting shaft (10) is rotatably mounted on the adjustment plate (6); the pressing roller II (8) is eccentrically mounted on one end of the mounting shaft (10), and an adjustment block (11) is mounted on the other end of the mounting shaft (10); and the pressing force between the pressing roller I (7) and the pressing roller II (8) can be adjusted by rotating the adjustment block (11).

4. A continuous longitudinal sealing mechanism as claimed in claim 3, characterized in that: An adjustment seat (12) extending downwardly from the adjustment block (11) is arranged at a position at the bottom of the adjustment plate (6) corresponding to the adjustment block (11); a pair of adjustment screws (13) are threadedly connected to the adjustment seat (12); the pair of adjustment screws (13) are respectively arranged at two sides of the bottom of the adjustment block (11); and the deflection setting of the adjustment block (11) is performed by screwing the pair of adjustment screws (13).

5. A continuous longitudinal sealing mechanism according to any one of claims 1 to 4, characterized in that: The longitudinal sealing ironing block pair (5) comprises a left ironing block (14) and a right ironing block (15); when the left ironing block (14) and the right ironing block (15) are closed, a gap is provided between the left ironing block (14) and the right ironing block (15) for the roll film to pass through.

6. A continuous longitudinal sealing mechanism as claimed in claim 5, characterized in that: The longitudinal sealing ironing block mechanism (1) comprises a left driving component (16) and a right driving component (17); the left driving component (16) is configured to control the opening of the left ironing blocks (14) of all longitudinal sealing ironing block pairs (5); and the right driving component (17) is configured to control the opening of the right ironing blocks (15) of all longitudinal sealing ironing block pairs (5).

7. A continuous longitudinal sealing mechanism according to claim 6, characterized in that: The left drive assembly (16) and the right drive assembly (17) are respectively a left drive cylinder and a right drive cylinder.

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